The term PERCH (ON) can be solved in a crossword puzzle with the answers SIT (3 letters) and SITATOP (7 letters). Perch is a verb meaning to SIT or rest on something, usually a high place. It can also refer to a type of fish or a type of bird. The word SIT is a verb meaning to rest one's body weight on the buttocks or haunches. SITATOP is a compound word made up of SIT and ATOP, which means to be at the highest point of something.